package com.day06;
/*
数组中的常见异常：
1.数组角标越界的异常：ArrayIndexOutOfBoundsException

2.空指针异常：NullPointerException
 */
public class ArrayExceptionTest {
    public static void main(String[] args){

        //1.数组角标越界的异常：ArrayIndexOutOfBoundsException
        int[] arr = new int[]{1,2,3,4,5};
       /* for(int i = 0;i <= arr.length;i++){
            System.out.println(arr[i]);
        }*/

        //System.out.println(arr[-2]);

        //System.out.println("hello");

        //2.空指针异常：NullPointerException
        //情况一：
//        int[] arr1 = new int[]{1,2,3};
//        arr1 = null;
//        System.out.println(arr1[0]);

        //情况二：
//        int[][] arr2 = new int[4][];
//        System.out.println(arr[0]);

        //情况三：
        String[] arr3 = new String[]{"AA","BB","CC"};
       // System.out.println(arr3[0].toString());//正确的
        arr3[0] = null; 
        System.out.println(arr3[0].toString());
    }
}
